@article{DE_1991_27_3_a0,
     author = {T. Sh. Abakirov},
     title = {Auxiliary exponents of exponentially separated systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {371--376},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_3_a0/}
}